Nvidia Shield Pro with 3.8 Arianna.
Two My Book Lives successfully mounted.
Using ethernet to connect.

Forever, XBMC/Kodi worked for me. Then I got the shield. Then Kodi updated to V18. After that, could never play the library on my NAS and the folks at Kodi were not able to help. So I bought MrMC and solved the problem This time I can play the library but only using file manager. When I try to go to my library I get a directory and if I browse I can't play anything.

I think this is a problem with the shield. Here is why:

1. Launch MrMC and go to file manager. I can play anything. So Ethernet connection is good.
2. Launch Plex - it behaves just the same as MrMC with the exception I can play things I load on the Pro's hard drive.
3. Plex plays local drive - means the plex server is OK.
4. Launch YouTube from the Shield's app screen and no problem with that. I can get to the internet. So router is connected and doing what it should.
5. This started with one NAS not mounted. It had been but all of a sudden it wasn't. So I mounted it. The Shield shows both mounted but now I can't click content on either.

I have no idea what is going on. Or why my shield cannot connect to my library with either application. Any help is appreciated.

I use plex to give further information. If MrMC didn't work and Plex did work I would be inclined to think I had an issue with the update. But since Plex has the same behavior, I am inclined to think the new update is just hunky dory and I have an issue with the Shield.

MrMC worked great and I added libraries. I think the issue now is for some reason my mounted NAS drives are not connecting as they should even though ethernet connection is fine.

I don't expect you guys will fix this issue - not yours to fix. But I am hopeful that someone will have a "this happened to me" story and will give me the answer. I think this is shield specific. I also think it will be something simple.

Result: The NFO files were scanned with out incident. But when tried to play "Young Guns" got the message "This file is no longer available." However can still play the movie via File manager. Can play the movie via Plex.

Conclusion: I don't know. This now seems isolated to MrMC. What should I do next? Suggestions?

Go to settings -> video -> library -> clean library, that should get rid of the ones that are not working

Looks like an easy fix and thank you for that. But before I get to that, another issue popped up.

There was a power outage for just a second yesterday. MBL2 and MBL3 restarted but I could no longer play any movies on them with either MrMC or Plex. On the shield I unmounted both and in apps >network settings, I cleared data. Then I mounted MBL2TB and MBL3TB again. Movies can now be reached on plex. However, I tried to play two different ones on MrMC. I hear the audio but I don't get video. I just see the MrMC screen. I can't stop it either. I push the home button and the shield homescreen shows me the movie is still playing and gives me the option to stop it. I stop it at that point but if I go back into MrMC the audio starts playing again. I have to restart the shield to stop it.